Add 38.8+-0.4 and 29.7+-0.3.

1.	Add 38.8+-0.4 and 29.7+-0.3.
Answer» SOLUTION :`bara=(1.54+1.53+1.44+1.54+1.45)//6=1.51` (II) `Deltaa_(1)=1.51-1.54=-0.03` `Deltaa_(2)=1.51-1.53=-0.02, Deltaa_(3)=1.51-1.44=+0.07,Deltaa_(4)=1.51-1.54=-0.03` `Deltaa_(5)=1.51-1.56=-0.06, Deltaa_(6)=1.51-1.46=+0.06` (iii) `BAR(Deltaa_(i))=(0.03+0.02+0.07+0.03+0.06+0.06)//6)=0.04` (iv) `bar(Delta a)//bara=0.04//1.51=0.03` (v) % error `=(bar(Deltaa)//bara)XX100%=3%`

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